No matter where you ultimately decide to sell your gold for cash, check here first for today’s gold prices. That way, you know how much your gold pieces are REALLY worth. You will also want to have some idea of the overall weight of your gold, as well as how many pieces are 14k or 18k (which is most common in gold jewelry) and how many are 24k (the purest form of gold). The higher the karat, the more your gold is worth.